How to Bleed and Replace Brake Fluid on a 2009 Honda TRX500 Foreman 4X4 (FM1)
Shop parts for a 2009 Honda TRX500 Foreman 4X4 (FM1) ATV.
This proprietary MotoSport guide walks you step-by-step through flushing and bleeding the brake system on the 2009 Honda TRX500 Foreman 4X4 (FM1). Follow these instructions carefully for safe, repeatable results. If you are unsure about any step, stop and consult a qualified technician.
Important model notes
- The TRX500 Foreman FM1 uses a separate front master cylinder (handlebar) for the front brakes and a rear master cylinder (foot lever) for the rear brake. Confirm reservoir locations before starting.
- Honda recommends using the brake fluid type shown in the owner's manual or stamped on the reservoir cap. Use DOT 3 or DOT 4 fluid only if specified by your manual — never mix DOT 5 (silicone) with DOT 3/4 systems.
- Inspect calipers, hoses, banjo bolts and crush washers while the system is open. Replace any cracked hoses or leaking fittings. Use new copper crush washers on banjo fittings if you remove them.
- Pads and rotors on the TRX500 should be checked before bleeding. Severely worn pads or contaminated rotors can make bleeding ineffective until pads/rotors are serviced.
Tools & supplies
- Correct DOT brake fluid (per owner's manual)
- Clear plastic tubing that fits bleeder nipples
- Catch bottle with a small amount of fresh fluid to prevent air ingestion
- Wrenches for bleeder nipples (usually 8mm or 10mm)
- Brake-bleeder kit, vacuum pump, or syringe (optional but recommended)
- Clean rags, gloves and eye protection
- Torque wrench (for caliper/banjo reassembly if removed)
- Small funnel or fluid syringe for topping reservoir
Preparation
- Park on a level surface, engage parking brake and remove key. Secure the ATV to prevent movement.
- Clean the master cylinder reservoir caps and surrounding area to prevent contamination.
- Remove enough front/rear wheels or panels for clear access if needed. Place drip pans under calipers.
- Refill both front and rear reservoirs to the max mark with the correct fresh brake fluid. Do not invert or spill fluid on painted surfaces — it damages paint. Wipe any spills immediately with water, then clean.
Bleeding sequence
Bleed from the caliper farthest from the master cylinder first, then progress to the nearest. For dual-front calipers, bleed the furthest front caliper first, then the other front caliper, then the rear. If you have separate front/rear master cylinders, bleed the front circuit completely, then the rear circuit.
Manual (two-person) bleed method
- Have an assistant slowly squeeze the lever/pedal 3–4 times and hold it depressed.
- Open the bleeder nipple 1/4 turn so fluid flows into the tubing and catch bottle. Air and fluid will escape; when flow slows, close the nipple.
- Tell your assistant to release the lever/pedal slowly. Top up reservoir to the max mark immediately after each cycle to prevent air entry.
- Repeat until clear fluid with no bubbles comes out and lever feels firm. Start with the furthest caliper and work toward the closest.
Vacuum or pressure bleed (preferred for single-operator)
- Attach vacuum pump or pressure bleeder per the tool's instructions. If using a pressure bleeder, pressurize reservoir per tool spec but do not exceed safe pressure.
- Open bleeder nipple and draw fluid until clean, bubble-free fluid discharges. Keep reservoir topped up during the process.
- Close the bleeder nipple, then move to the next caliper.
Finishing steps
- When all circuits are clear, ensure reservoir fluid level is at the max mark and reinstall the reservoir cap securely.
- Wipe all connections clean, inspect for leaks, and reinstall any removed wheels or panels. If any banjo bolts were removed, use new crush washers and torque to Honda spec if available.
- Operate the brakes repeatedly while stationary until a firm pedal/lever feel is achieved. Adjust free play if needed according to the service manual.
- Test ride slowly in a safe area to bed the system and confirm braking performance. Recheck fluid level and fittings after the first ride.
Safety & disposal
- Never let the brake fluid reservoir run dry during bleeding — that will draw air into the system.
- Brake fluid is hygroscopic; once opened use a fresh container and store it sealed. Replace old fluid every 1–2 years or per maintenance schedule.
- Dispose of used brake fluid according to local hazardous-waste regulations. Do not pour it on the ground or into drains.
Common troubleshooting
- Spongy lever after bleeding: likely trapped air or soft/swollen hoses. Re-bleed and inspect hoses.
- Leaking bleeder screw or caliper: replace nipple or caliper seals and re-bleed.
- Brake fade after bleeding: check pads/rotors and ensure correct fluid type was used.
Model-specific tips for the TRX500 Foreman FM1
- Ground clearance and working space are limited when the ATV is on ramps. Use a secure stand or jack points recommended by Honda to access calipers safely.
- The rear brake pedal master cylinder sits low and can collect road grime — clean the cap area before opening and inspect the rubber boot for tears that can allow contamination.
- Some FM1 machines have heat-shielding or skid plates that complicate access to calipers; remove these first to avoid straining brake lines.
- When replacing banjo bolts or caliper hardware, use new copper crush washers and torque uniformly to prevent leaks.
Following this MotoSport procedure will give you a clean, dependable brake system on your 2009 Honda TRX500 Foreman 4X4. If brakes remain soft or performance is inconsistent after a careful bleed, contact a professional mechanic.
Related Shopping Categories
Shop Brake Fluid for a 2009 Honda TRX500 Foreman 4X4 (FM1) ATV.
Shop Brake Bleeders for a 2009 Honda TRX500 Foreman 4X4 (FM1) ATV.
Shop Brake Pads for a 2009 Honda TRX500 Foreman 4X4 (FM1) ATV.
Shop Brake Lines for a 2009 Honda TRX500 Foreman 4X4 (FM1) ATV.
Shop Brake Tools for a 2009 Honda TRX500 Foreman 4X4 (FM1) ATV.
Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.
